Lock



June 23, 1925.

M. S. FINKELSTEIN LOCK Filed Feb. 28, 1922 INVENTOR Mffflmklskza ATTURNE I Patented June 23, 1925.

MOB/BIS S. FINKEL'STEIN, 0F NEV] YORK, N, Y.

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Application filed Febrvary 28, 1922. Serial No. 539,868.

To ((ZZ 0/ 10772, it may concern.

Be it known that MORRIS S. FrNKnLs'rnrN. a citizen of the United States,and a resident of New York city, in the county of New York and State ofNew York, has invented certain new and useful Improve-- ments in Locks,of which the following is a specification.

My invention relates, to looks, and the object of my invention is toprovide a lock suitable for doors which swing on hinges and openinwardly.

A further object is to provide a lock having a main bolt controlled byone key and a second bolt adapted toengage the main bolt and controlledby an independent key.

A further object is to provide a lock, the main bolt of which is adaptedto be connected in co-operative engagement with one end of a brace barwhich extends to the floor to brace the door when closed and locked. V

A further object is to provide means for carrying the brace-bar on thedoor when the door is open.

A further object is to provide means to carry said bar to one side topermit free ingress when the door is being opened.

Referring to the drawings which form a part of this specification,

Figure l is a front elevational view showing a'portion of the inner sideof a door with the improved lock mounted thereon and the back plateremoved, and the door jam carrying the cooperative portions, the lockbeing in unlocked position.

Figure 2 is a similar front view showing the position of the brace-barwhen the door is locked, and the safety chain connected to the door.

Figure 3 is an exterior view showing the brace-bar carried by the mainbolt into locked position together with the main bolt.

Figure 4 is an inverted end view of the lock SllOWiIlg the brace-bar incross section and main bolt in locked position.

Figure 5 is a side elevational view of the door with the brace-bar setin locked position.

Figure 6 is a side view showing the top of the brace-bar held by theguard.

A, indicates a door which opens inwardly and A the door jamb. B,indicates the lock frame in which is formed a guiding slot C for themain bolt D which extends longitudinally. The main bolt D is providedwith two vertically extending slots D and E respectively. The slot D isadapted to receive a vertically movable bolt F oontrolled by a separatelock and key G, and the slot E is adapted to receive the upper end ofthe brace-bar H and carry it under the plate I in its locking movement.This movement carries the slot D into alignment with the bolt F which isthen thrown by the locking part G into engagement to lock the main" boltin locked position. The main bolt is controlled by the lock J operatedin the usual manner by a key J. The lock G is also of the usual type andoperated by a key G but the bolt F is provided with two indentations Kand K respectivelyto receive a holding pin L held in operativearrangement by a spring M, the object of this arrangement being to holdthe bolt in its locked or unlocked position against the action ofgravity. j

g It will be observed that the back-plate of the frame B projects beyondthe edge of the door'A adjacent the door jamb A and overlaps thejamb-plate A which plate is provided with a vertically extendingprojection A? which is overlapped by an inwardly extending projection Bformed on the frame of the main look. This construction prevents themain bolt from being easily reached since the lock frame would have tobe cut away before the bolt could be reached with a saw or chisel. Theend of the main bolt D is held by the plate A on which is formed theusual lock member A into which the end of the bolt projects. Forconvenience in locking the door from the inside a knob controlled latchlever A controlled by a knob A is adapted to engage the projections NNrespectively formed integral with the bolt F. By rotating the knob thebolt F may be moved in the desired direction. A plate 0 carried on theframe overlaps the lower end of the bolt F to guide and hold the same.Carried on the bottom of the door is a socket P to hold the lower end ofthe brace-bar when the door is open, the upper end of said bar beingheld by the loop Q, which swings from its supporting hinges RRrespectively one of which is located at each side of the channel S. Thischannel extends from the plane surface S to the upper surface S of theframe and is curved as illustrated by the dotted line S of Figure 5. T,indicates a chain, one end of which is connected to the brace-bar nearits upper end as illustrated in Figure l, and the other end is connectedto the plate A V, indicates a safety chain, one end of which carries ananchor-pin V the head V of which may be inserted in the opening V formedin the frame plate B and thence under said plate as illustrated to holdit in detachable relation. The opposite end of the chain is held to theplate A by a plate W in which the holding pin W is held in swivelingrelation. X, indicates a floor socket into which the lower end of thebrace-bar projects and which forms a sub stantial abutment for said bar.

The lock is operated as follows:

Assuming the door A. to be open. The operator removes the brace-bar fromthe door after swinging guard Q into its upper open position andconnects the free end of the chain T to the ring T, and then places thelower end of the brace-bar in the socket X and rests the upper endagainst the plate A after which he passes through the door way andswings the door until it is nearly closed, then reaches inside andswings the top end of the brace-bar into channel S of the lock andthereafter closes the door.

The upper lock is then operated by the key J which causes the latch-barJ to enter the slot J in its rotational movement and throw the main boltinto locked position and thus carrying the upper end of the brace-barunder plate I and bringing its upper end under the abutment Y of thelock frame. The key G is then used to move bolt F into the'slot D, thelatch lever Gr entering the slot F of the bolt F in its rotationalmovement and thus completing the locking operation.

In order to open the door the lock G is first operated and then lock Jafter which the door is opened and the top of the bracebar isautomatically drawn out of the channel S by engagement with the curvedportion S of said channel and swung to one side by chain T.

lVhen locking from the inside the bolt F is operated by the knob A andthe safety chain V attached in the usual way.

Having thus described my invention I claim as new 1. A look comprising'aframe having a main bolt adapted to be operated by a key and a secondbolt adapted to hold said main bolt in locked position and a brace-barcarried into locked position by said main bolt and means forautomatically withdrawing said brace-bar from said look when the door isbeing opened.

2. A lock comprising a frame having a main bolt adapted to be operatedby a key and a second bolt adapted to hold said main bolt in lockedposition and a brace-bar carried into locked position by said main boltand means for carrying said brace-bar on said door.

7 3. A look comprising a frame having a main bolt adapted to be operatedby a key, a brace bar adapted to be. carried into locked position bysaid main bolt, said brace bar cooperating with a groove having aninclined portion leading therefrom, a chain attached to said brace barand to the frame of the door whereby when the door is opened, the bracebar rides out of said groove on the inclined portion thereof and ispulled aside by said chain.

Signed at New York in the county of New York and State of New York this15th day of February A. D. 1922.

MORRIS S. FINKELSTEIN. Witness:

FRANK M. ASHLEY.

